Sökning: "Detuning"
Visar resultat 11 - 15 av 28 avhandlingar innehållade ordet Detuning.
11. Experimental Investigation of Three-Dimensional Single and Double optical Lattices
Sammanfattning : A complete laser cooling setup was built, with focus on threedimensional near-resonant optical lattices for cesium. These consist of regularly ordered micropotentials, created by the interference of four laser beams. One key feature of optical lattices is an inherent ”Sisyphus cooling” process. LÄS MER
12. Time dependent processes incavity QED
Sammanfattning : Cavity quantum electrodynamics (QED) has become one of themost successful tools for quantum information processing, butalso for the study of other pure quantum effects. In thisthesis we investigate one such system, the micromaser; an atomtraverse a cavity and interacts with the quantized modes of thecavity field. LÄS MER
13. Development of 1.3-μm GaAs-based vertical-cavity surface-emitting lasers
Sammanfattning : Long-wavelength vertical-cavity surface-emitting lasers (VCSELs) are desirable as low-cost sources for optical metropolitan-area and access networks. In the development of 1.3-µm VCSELs, most attention today is given to monolithic GaAs-based solutions, although no established active material exists in this wavelength region. LÄS MER
14. Photoelectron spectroscopy in the vicinity of a core-ionization threshold
Sammanfattning : The fundamental interaction between photons and free molecules/atoms has been studied by means of soft x-ray photoelectron spectroscopy. Special interest has been paid to the non-resonant and resonant processes in the vicinity of a core-ionization threshold. LÄS MER
15. Wideband Active and Passive Antenna Solutions for Handheld Terminals
Sammanfattning : This thesis presents solutions and studies related to the design of wideband antennas for wireless handheld terminal applications. A method of electrically shortening the terminal chassis length to obtain resonance at high frequencies has been proposed and evaluated, thereby increasing the antennas impedance bandwidth. LÄS MER